Add raspberries to a blender and blitz until pureed.
Pour the pureed raspberries through a fine-meshed strainer placed over a large bowl. Use the back of a spoon to push all the puree through. All you should be left with, in the strainer, is the seeds.
Raspberries: You can use fresh or frozen raspberries. If using frozen there is no need to blend the raspberries as they break down when defrosted. Simply thaw the raspberries in a fine-meshed strainer placed over a large bowl. Push the raspberries through the strainer to remove seeds.Want a Sweeter Puree?: Add a tsp of sugar to the strained puree and stir until dissolved. Continue to add 1 tsp at a time until you reach desired sweetness. (do not sweeten if serving a baby)Want a Thicker Puree?: You can reduce the puree by placing it in a small saucepan. Bring to a boil then reduce to simmer for a few minutes, or until desired thickness. Makes approx 1 cup of sauceNutritional information is a ROUGH guide only, calculated using an online nutrition calculator.